Condensed Consolidated Statements Of Cash Flows (USD $)	3 Months Ended		120 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2012
Operating activities:
Net loss	$ (15,559,218)	$ (13,868,207)	$ (198,884,719)
Adjustments to reconcile net loss to net cash used in operating activities:
Non-cash stock-based compensation	828,084	683,693	9,818,740
Depreciation and amortization	33,965	29,903	455,944
Stock issued for license agreement			575,023
Non-cash interest expense			34,020
Gain on disposition of assets			(2,208)
Fair value of warrants for finder's agreement			433,750
Changes in operating assets and liabilities:
Prepaid contract research and manufacturing expenses, other prepaid expenses and other assets	(560,177)	(469,677)	(1,527,291)
Accounts payable, accrued contract research and manufacturing expenses and other accrued expenses	(167,191)	3,618,081	11,651,269
Accrued compensation and related expenses	(625,594)	(683,934)	793,843
Net cash used in operating activities	(16,050,131)	(10,690,141)	(176,651,629)
Investing activities:
Acquisitions of property and equipment	(20,929)	(70,777)	(735,402)
Proceeds from sale of assets			3,677
Purchases of short-term investments		(45,128,980)	(115,143,906)
Redemptions and sales of short-term investments	4,500,000		115,143,906
Security deposits			(38,267)
Net cash provided by (used in) investing activities	4,479,071	(45,199,757)	(769,992)
Financing activities:
Proceeds from borrowings from affiliate			1,745,000
Proceeds from exercise of stock options		8,372,465	80,729
Proceeds from exercise of common stock warrants			9,054,546
Recapitalization of the Company			(400,000)
Proceeds from sales of equity securities, net of issuance costs	22,145,220	37,770,250	218,543,385
Receipt of recovery of short-swing profits		73,103	73,797
Receipt of cash for stock subscription receivable			4,625
Net cash provided by financing activities	22,145,220	46,215,818	229,102,082
Net increase (decrease) in cash and cash equivalents	10,574,160	(9,674,080)	51,680,461
Cash and cash equivalents, beginning of period	41,106,301	47,593,055
Cash and cash equivalents, end of period	51,680,461	37,918,975	51,680,461
Supplemental disclosure of cash flow information:
Cash paid for interest			$ 224,328